Final answer:
The Commissioner typically issues licenses for limited lines of insurance such as credit, travel, or crop, but not for automobile insurance as it is considered a major line of insurance, not a limited one.
Step-by-step explanation:
The question is regarding the issuance of licenses for limited lines of authority by the Commissioner. In most jurisdictions, insurance commissioners are authorized to issue licenses for various specific lines of insurance coverage. These may include credit insurance, meant to pay off consumer loans in the event of death, disability, or unemployment; travel insurance, which typically covers trip cancellations, lost luggage, medical expenses, and other losses incurred while traveling; automobile insurance, covering liabilities and losses from operating cars; and crop insurance, protecting farmers against the loss of their crops due to natural disasters or the loss of revenue due to declines in the prices of agricultural commodities.
However, the Commissioner's role as outlined does not extend to licensing automobile insurance, as this is generally not considered a 'limited line' of authority. Rather, automobile insurance is a major line of insurance due to its broad application and requirement for operation of a vehicle. Therefore, among the options given, (C) Automobile is the line of authority for which the Commissioner typically may not issue a limited lines license.